The Martians are actually protecting themselves from US!!. - since the Earth probe landed on their planet they are taking measures to ensure their security by replacing our scientists with doppelgangers who report nothing. A very insightful film that was under-rated and ahead of it's time, with a 1963 vision of a primitive mars rover.
The Day Mars Invaded Earth
Martians replace a scientist and his family to pave way for their invasion.
